1042242021 has 24 divisors (see below), whose sum is σ = 1535040000. Its totient is φ = 681239232.

The previous prime is 1042241989. The next prime is 1042242043. The reversal of 1042242021 is 1202422401.

It is not a de Polignac number, because 1042242021 - 2⁵ = 1042241989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1042241985 and 1042242003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042242121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214780 + ... + 219578.

It is an arithmetic number, because the mean of its divisors is an integer number (63960000).

Almost surely, 2^1042242021 is an apocalyptic number.

It is an amenable number.

1042242021 is a deficient number, since it is larger than the sum of its proper divisors (492797979).

1042242021 is a wasteful number, since it uses less digits than its factorization.

1042242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273 (or 5270 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1042242021 is about 32283.7733389392. The cubic root of 1042242021 is about 1013.8869340453.

Adding to 1042242021 its reverse (1202422401), we get a palindrome (2244664422).

The spelling of 1042242021 in words is "one billion, forty-two million, two hundred forty-two thousand, twenty-one".